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Code Bibliographique ADS : 1992Natur.355..804S

DOI : 10.1038/355804A0

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Nature 355 (1992) 804-806

A counterjet in the elliptical galaxy M87

William B. Sparks 1, D. Didier Fraix-Burnet 2, F. Macchetto 1, F. N. Owen 3

(02/1992)

An optical counterpart to the radio hotspot in the southeast lobe of M87 has been identified at about the same distance as the radio jet but oppositely located. Polarization data identify the optical emission as synchrotron radiation, and the severe energetic requirements of maintaining this emission suggest continuous replenishment at the site of the hotspot. It is proposed that this is provided by an invisible 'counterjet', and it is argued that the counterjet cannot be identical to the visible known jet but must be intrinsically somewhat fainter.

1 :	Space Telescope Science Institute (STSCI)
	Space Telescope Science Institute
2 :	Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT)
	CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III
3 :	National Radio Astronomy Observatory (NRAO)
	NRAO

Domaine

:

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Mots Clés : ELLIPTICAL GALAXIES – RADIO GALAXIES – RADIO JETS (ASTRONOMY) – SYNCHROTRON RADIATION – ASTRONOMICAL OBSERVATORIES – CHARGE COUPLED DEVICES

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Contributeur : Didier Fraix-Burnet <>

Soumis le : Mardi 18 Décembre 2007, 16:22:28

Dernière modification le : Mardi 18 Décembre 2007, 16:22:28